Gasa, Godofredo Victor, Antonio Anastacio, Cesar de Guzman Jr., and Gil Maglalang Jr. “Analysis of the Skin to Calyceal Distance (SCD) to the Upper Pole Calyx Among Filipino Patients: A Guide to Upper Pole Access Percutaneous Nephrolithotomy (PCNL)”. Philippine Journal of Urology 27, no. 1 (February 20, 2020): 48–52. Accessed June 27, 2025. https://pjuonline.com/index.php/pju/article/view/41.